#include "ardour/audiosource.h"
#include "ardour/region_factory.h"
#include "ardour/profile.h"
+#include "ardour/crossfade_binder.h"
#include <gtkmm2ext/gtk_ui.h>
_apply_to (xfade);
- _session->add_command (new MementoCommand<Crossfade> (*xfade.get(), &before, &xfade->get_state ()));
+ _session->add_command (
+ new MementoCommand<Crossfade> (
+ new ARDOUR::CrossfadeBinder (_session->playlists, xfade->id ()),
+ &before, &xfade->get_state ()
+ )
+ );
+
_session->commit_reversible_command ();
}
#include "ardour/session_playlists.h"
#include "ardour/region_factory.h"
#include "ardour/midi_automation_list_binder.h"
+#include "ardour/crossfade_binder.h"
#include "ardour/crossfade.h"
#include "pbd/error.h"
#include "pbd/id.h"
cerr << "Alist " << id << " not found\n";
} else if (obj_T == "ARDOUR::Crossfade") {
- boost::shared_ptr<Crossfade> c = playlists->find_crossfade (id);
- if (c) {
- return new MementoCommand<Crossfade> (*c.get(), before, after);
+ if (have_id) {
+ boost::shared_ptr<Crossfade> c = playlists->find_crossfade (id);
+ if (c) {
+ return new MementoCommand<Crossfade> (*c.get(), before, after);
+ }
} else {
- error << string_compose (X_("Crossfade %1 not found in session"), id) << endmsg;
+ return new MementoCommand<Crossfade> (
+ new CrossfadeBinder (n, playlists),
+ before, after
+ );
}
} else if (registry.count(id)) { // For Editor and AutomationLine which are off-limits herea
/** A class that can return a Stateful object which is the subject of a MementoCommand.
*
* The existence of this class means that the undo record can refer to objects which
- * don't exist in the session file. Currently this is just used for MIDI automation;
- * when MIDI automation is edited, undo records are written for the AutomationList being
- * changed. However this AutomationList is a temporary structure, built by a MidiModel,
- * which doesn't get written to the session file. Hence we need to be able to go from
- * a MidiSource and Parameter to an AutomationList. This Binder mechanism allows this
- * through MidiAutomationListBinder; the undo record stores the source and parameter,
+ * don't exist in the session file. Currently this is used for
+ *
+ * 1. MIDI automation; when MIDI automation is edited, undo records are
+ * written for the AutomationList being changed. However this AutomationList
+ * is a temporary structure, built by a MidiModel, which doesn't get written
+ * to the session file. Hence we need to be able to go from a MidiSource and
+ * Parameter to an AutomationList. This Binder mechanism allows this through
+ * MidiAutomationListBinder; the undo record stores the source and parameter,
* and these are bound to an AutomationList by the Binder.
+ *
+ * 2. Crossfades; unlike regions, these are completely removed from a session
+ * when they are deleted. This means that the undo record can contain
+ * references to non-existant crossfades. To get around this, CrossfadeBinder
+ * can do `just-in-time' binding from the crossfade ID.
*/
template <class obj_T>
class MementoCommandBinder : public PBD::Destructible
{
public:
/** @return Stateful object to operate on */
- virtual obj_T* get () = 0;
+ virtual obj_T* get () const = 0;
+
+ /** @return Name of our type */
+ virtual std::string type_name () const {
+ return PBD::demangled_name (*get ());
+ }
/** Add our own state to an XMLNode */
virtual void add_state (XMLNode *) = 0;
_object.Destroyed.connect_same_thread (_object_death_connection, boost::bind (&SimpleMementoCommandBinder::object_died, this));
}
- obj_T* get () {
+ obj_T* get () const {
return &_object;
}
XMLNode* node = new XMLNode(name);
_binder->add_state (node);
- node->add_property("type_name", demangled_name (*_binder->get()));
+ node->add_property ("type_name", _binder->type_name ());
if (before) {
node->add_child_copy(*before);